Reactive oxygen species, granulocytes, and NETosis -- Immunizations against Respiratory Infections in Children in Primary Health Care in Poland: Coverage and Delays -- Effectiveness of Immunoprophylaxis in Suppressing Carriage of Neisseria Meningitidis in the Military Environment -- Detection of Influenza and Other Respiratory Viruses Carried out in the Influenza Project - Monitoring Vaccine Effectiveness (I-MOVE) -- Cytokines and Toll-like Receptors in the Immune Response to Influenza Vaccination -- Vaccination Status and Perception of Influenza Vaccination in the Polish Population -- Immune Efficacy of First and Repeat Trivalent Influenza Vaccine in Healthy Subjects and Hemodialysis Patients -- First-line Immunosuppressive Treatment in Children with Aplastic Anemia: Rabbit Antithymocyte Globulin -- Index.